DP2000 Portable Dew Point Analyzer Operations Manual
Super Systems Inc.
Page # 15 of 30
12.0
Begin the 11.3% (Zero) calibration process
12.1
After leaving the sensor in the salt for at least twenty-four (24)
hours, turn the unit on. The reading on the display is not important at
this point.
12.2
Simultaneously press the “11.3%” and “Calibration” buttons on the
microprocessor board.
13.0
Verify the 11.3% (Zero) calibration
13.1
Do not be concerned if the unit does not display 11.3, since it is not
supposed to match the value of the calibration salt.
13.2
Use the “Sensor Temp” switch on the faceplate of the unit to
determine and record the sensor temperature.
13.3
Look up this temperature on the “Theoretical Dew Point Values for
Calibration Verification” chart located in the back of this manual.
Appendix “A” will show the temperature values in Fahrenheit, and
Appendix B will show the temperature values in Celsius.
13.4
Next to the appropriate temperature, note the number in the
corresponding column titled “11.3%”. This should match with the dew
point that is shown on the display of the DP2000.
14.0
Determine the acceptability of the reading
14.1
The value printed on the chart in Appendix A is a theoretical value,
and some variation can be expected. When a calibration is performed
at SSI, we certify (in writing) that the unit displays /- 1 degree
of the theoretical value after it has been calibrated. We would not
consider a calibration to be successful unless it is /- 1 degree,
however in the case of a field calibration, this degree of accuracy may
or may not be required. The degree of accuracy that is acceptable is
determined by the policy of the person performing the calibration.
NOTE: Keep in mind that the DP2000 only displays even numbers, and
not tenths of a degree. Therefore, a reading of 18°F (-7.8°C) could be
as low as 17.50°F (-8.06°C) or as high as 18.49°F (-7.51°C).